Photographic-printing machine



w. 0. WOOD. PHOTOGRAPH-Q PRINTING MACHINE. APPLICATION FILED AUG.26| I920.

1,384,372. Pat nt d u1y12,1921.

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Patented July 12, 1921.

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Mw flaw E 'A EN OFFICE.

WILLIAM 3. W001); for SE TTLE, WASHINGTON.

ap ease fil e d ikugu-sti26, 1,920. "seri 1 ii f oaosi,

To'allwhom it. may comm:

Be it known thatI, WILLIAM D. Wooma citizen of the United States,and residing at Seattle, in the county of King and State of \Vashington, have invented certain new and useful Improvements in Photographic PrintingMachines, of whichthe following is a specification.

This invention relates to improvements in photographic printing machines of that type wherein the negative is supported upon a transparent bed plate, and the printmg paper forced onto the negative by theman ual operation of a pressure pad, the illumination or light necessary for exposure being automatically maintained while the pressure pad is in operative relation to the bed.

The main object of the present invent on is to provide a superior printing pad, with oscillating movement and an automatic numbering deviceand a perforate-d scale in adjustable masks.

In the drawings:

Figure 1 is a plan view of the improved machine.

Fig. 2 is a side elevation of the same.

Fig. 3 is a longitudinal section with the pressure pad in operative position.

Fig. 4 is a broken sectional view illustrating more particularly the 'numberlng machine for the prints.

Fig. 5 is a sectional detail illustrating the numbering machine for indicating the number of operations of the pressure pad.

Fig. 6 is a diagrammatic view illustrating more particularly the lighting system.

Fig. 7 is a diagrammatic view illustrative of the various circuits. i

The improved machine comprises a hollow box-like base 1, the top of which provides a bed 2 for the printing operation. A frame including "side bars 3 and a forward or handle bar 4 is pivotally mounted at 5 in brackets 6 secured to the bed plate near one edge thereof. An oscillating pressure pad 7 is supported in the frame, having pin and slot connection 8 with the side bars 3, in order that the operative face of the pressure pad may adjust itself to any irregularities of the bed, negative or paper. The lower or operative face of the pressure pad has a felt or other suitable covering 9, and one edge of such pressure pad is preferably provided with a paper holding clip 10 having an en gaging lip 11 to underlie the operative face of the pad, and a corresponding lip 12 sp cificationof etters-ream. 5 Patented e rno'roonArHro-PnmmmG MACHINE.

July 12, 1921;.

guided byheaded pins-13 projecting from the upper surface of the pad and held at its upper limitjof movement by a spring 14. Obviously by pressure on the lip 12 the printing" paper indicated at 15 may have its edge inserted between the lip 11 and the surface 9of the pressure. j

The rear edge of the. pressure pad is formedwith an opening 16, which on a spring controlled pin17 is mounted a numbering stamp 18. This stamp is capable of rotation on the pin. The frame of the numbering stamp has a projection 19, adapted, as the pressure pad and carrying frame thereof is elevated to engage a roller 20 carried by one end of the standard 21 supported by an upright'24 secured to the base 1. As the pressure pad and the carrying frame is elevated, the numbering machine will be turned on its pivot so that the printing face thereof will engage an inking roller 25 secured on the upright 24.

The bed plate 2 of the base is provided with an aperture 28 adapted to be closed by transparent material 29. The bed is provided with masks 30 defining the outline of the opening 28, two of said mask guides having elongated apertures 31. Cross masks 32 are disposed in right-angular relation over the transparent material 29, one edge of each of said strips-having a thumb screw 33 extending through one of the apertures 31. The masks 32 may by relative adjustment, for instance through gage openings 34 formed in the edges of such masks, define a printing opening as 35. The size of said opening may be thus adjusted in accordance with the desired border or other detail of the print to be made. A negative holding clip 36 is secured upon the bed plate to secure the negative in position, this clip being manually raised when desired to insert the negative through a lever 37 pivotally secured at 38 on the underside of the bed plate and having an upstanding projection 39 to engage beneath the clip 36 at one end, the other end of the lever having a projection 40 extending through the bed plate and terminating in a button 41.

The lightmeans for exposure is provided by a lamp '42 mounted within the base 1, and having a circuit 43 from a source of energy 44,"which circuit is broken at 45 in spaced contacts which extend above the bed plate 2. These contacts are bridged to close the circuit by member 46 carried upon a rod 47 having a spring mounting at one end as at 48 in a supporting bracket 49 rising from the base 1. The other end of the rod 47 extends beneath a roller 50 on the carrying frame, so that as said frame is depressed tomove the pressure pad to operative position, the cirouit Will be closed to light the lamp 42.

To provide for readily determlning the last number on the numbering machine 18, there is arranged on the bed plate a mirror 51 supported in a'suitable upright, in which mirror the last number on the numbering machine is reflected when the carrying frame and the pressure pad is in elevated position. This enables the operator to adjust such machine When changing prints.

What I claim is In a photographic printing machine, a

base having a source of light, an opening therein covered by transparent material to receive the negative, a carrying frame pivotally mounted on the base, a pressure pad carried by and having a limited free movement with respect to the frame, a spring rod supported on the machine and having a sliding connection With the carrying frame, a light circuit having spaced contacts arranged in the ath of movementof said rod in the operatlon of the carrying frame, whereby said rod is adapted to close and open said circuit as the carrying frame is moved to an operative or inoperative position.

In testimony WhereofI afiix my signature,

WILLIAM D. oon, I 

